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Updated 2026-10-15
County water report

Spokane County Water Quality: 4 Cities Ranked by the Records

Spokane County, Washington: 4 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Spokane County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumDetected in 1 system of 4 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest18.9 µg/L
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest6.1 ng/L
Lead (90th percentile)Detected in 4 systems15 µg/L federal action level · US EPAHighest11.1 µg/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 4 tested10 ng/L federal MCL (2024) · US EPAHighest3.2 ng/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 4 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3.9 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 2 systems of 4 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest23.7 ng/L
Perfluorobutanoic acid (PFBA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest79.2 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 4 testedNo federal or state limit; shown for transparencyHighest139.3 ng/L
23 PFAS tested, none detected in any systemShow

Tested in these 4 systems: AIRWAY HEIGHTS CITY OF, CHENEY CITY OF, LIBERTY LAKE SEWER & WATER DISTRICT, SPOKANE CITY OF

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluoroheptanoic acid (PFHpA)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanoic acid (PFOA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
4 cities

Cities ranked by the records

Showing 4 of 4 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Spokane County1 of 4 city reports had a PFAS sample above a 2024 EPA limit
  1. Spokane6.1 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Washington
Lead

0of 4 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Washington
Who supplies the county

Largest water systems

  1. SpokaneSPOKANE CITY OF · WA5383100
    346,138 served
  2. CheneyCHENEY CITY OF · WA5312400
    16,954 served
  3. Liberty LakeLIBERTY LAKE SEWER & WATER DISTRICT · WA5347150
    14,500 served
  4. Airway HeightsAIRWAY HEIGHTS CITY OF · WA5300650
    9,489 served
Questions

Frequently asked

How does Spokane County tap water compare across cities?

PurityMap ranks 4 cities in Spokane County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Cheney's main water system: CHENEY CITY OF · PWSID WA5312400 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Spokane County cities had a PFAS sample above a 2024 EPA limit?

1 of 4 Spokane County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Spokane (PFOS 6.1 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 3.

Is there lead in Spokane County tap water?

Utilities report lead as a 90th-percentile result from home taps. 4 of 4 Spokane County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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